Debug the program so it prints the factorial of a positive integer entered by the user. This is calculated by multiplying all the numbers from 1 up to that number together. For example, 5 factorial is 5*4*3*2*1 = 120. import java. util. Scanner;

public class U4_L1_5_Activity_Two{
public static void main(String[] args){

Scanner scan = new Scanner(System. in);
int num = scan. nextInt();
while(num >= 0){
int prod = 1;
num--;
prod = prod*num;
}
System. out. println(prod);

}
}